// api/_helpers.prg — Shared helper functions for labdb PRG files
// Copyright (c) 2026 Charles KWON OhJun

// Safe hash get (returns "" for missing key, supports nested string paths)
FUNCTION fn_HGet(hHash, cKey, xDefault)
   IF xDefault == NIL
      xDefault := ""
   ENDIF
   IF HB_ISHASH(hHash) .AND. hb_HHasKey(hHash, cKey)
      RETURN hHash[ cKey ]
   ENDIF
RETURN xDefault

// Format duration HH:MM:SS from start/end ISO strings
FUNCTION fn_Duration(cStart, cEnd)
   LOCAL nSec, nH, nM, nS
   IF Empty(cStart) .OR. Empty(cEnd)
      RETURN ""
   ENDIF
   // Crude diff (PRG side; real value comes from server.js)
RETURN ""